So you like the look of this one do you? I suppose you what to know how to get it on the desktop now. There are more that one way to skin a cat when it comes to setting the wallpaper / bcakground as your desktop. One way is to right click the wallpaper below and then select 'save target as...' (IE & Opera) or 'save link as...' (Firefox). If you do this - don't forget where you saved it! Now go to wherever it is you normally set your desktop backgrounds for your computer and selected the saved wallpaper.
Instead you could, when the full screen version has loaded up, right click it and select 'save image as...' or 'set as Desktop Background' or 'Set as Background'.When the time comes - you'll know what to do. I believe in you. I bet you've figured it out already. I'll keep a lid on it now.
Return to wallpaper thumbnails.